Silicon Laboratories Inc.

Hasan Ali Stationwala

Deepak Pancholi

Ayan Ghosh

A BLE system includes a network controller, peripherals, and centrals. As one of the peripherals begins to roam, the current central in a connection with the peripheral detects when the peripheral device is moving away from the current central and reports the roaming to the network controller. The peripheral receives a request from the current central to advertise for handoff evaluation during the connection and the other centrals receive requests from the network controller or from one or more of the centrals to scan for handoff evaluation purposes. The centrals determine the received signal strength from the received advertising packets and send the received signal strengths to the network controller. The network controller determines a next target central based on the received signal strengths. The network controller then causes the peripheral to disconnect from the current central and the current central advertises and establishes a connection with the next target central.

Coordinated roaming for low energy roaming aware peripheral devices

A retry technique reduces or eliminates redundant transmit streams and redundant retransmissions when multiple devices are listening to the same audio stream. The retry techniques reduce power consumption and reduce airtime usage. The retry technique includes communicating data using a hybrid isochronous group including a plurality of broadcast isochronous streams from a source device to a plurality of sink devices. The hybrid isochronous group includes, for each broadcast isochronous stream, a group of connected isochronous streams including a connected isochronous stream to the source device from each of the plurality of sink devices. The broadcast isochronous streams communicate the data and the connected isochronous streams communicate acknowledgements of receiving the data.

Retry mechanism for low energy communications

A BLE system includes a network controller, peripherals, and central. As one of the peripherals begins to roam, the current central device in a connection with the peripheral detects when the peripheral device is moving away from the current central. Other centrals receive requests to perform coordinated sensing of transmissions from the peripheral device to the current central device. The coordinated sensing includes the other central devices monitoring transmissions from the peripheral device to determine respective received signal strength indicators (RSSIs) on at least one frequency corresponding to a frequency hopping pattern of the connection. The other centrals report the coordinated sensing results to the network controller which determines a next central based, at least in part, on the sensed RSSIs. The network controller sends blacklists to centrals that are not the next central and the peripheral disconnects from the current central, advertises, and reconnects with the next central.

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Hyderabad Telangana, India

Hasan Ali Stationwala